S
M
T
W
T
F
S
26
80°
56°
27
82°
56°
28
82°
55°
29
84°
57°
30
85°
57°
31
84°
56°
1
78°
54°
2
78°
55°
3
82°
55°
4
78°
54°
5
78°
55°
6
80°
55°
7
84°
55°
8
79°
56°
9
83°
55°
10
84°
56°
11
86°
56°
12
85°
54°
13
84°
54°
14
84°
53°
15
85°
55°
16
85°
56°
17
84°
57°
18
86°
57°
19
86°
56°
20
85°
55°
21
83°
52°
22
81°
51°
23
80°
51°
24
79°
54°
25
81°
52°
26
86°
55°
27
86°
56°
28
85°
56°
29
86°
53°
30
85°
54°
31
86°
53°
1
85°
52°
2
83°
52°
3
84°
54°
4
85°
56°
5
86°
56°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in San Anselmo
San Anselmo's August 2026 forecast shows daily high temperatures ranging from 78° to 86°, with overnight lows between 51° and 57°. The average high for August is 83° with an average low of 55°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how August weather will actually feel in San Anselmo. See also: September | October | November.
